61 Danaë

Danaë /ˈdæneɪ.iː/ (minor planet designation: 61 Danaë) is a stony (S-type) asteroid in the outer asteroid belt's background population, approximately 84 kilometer in diameter. It was discovered by French astronomer Hermann Goldschmidt on 9 September 1860, from his balcony in Paris, France.[17] Goldschmidt was ill when asked to name the asteroid, and requested his fellow asteroid-hunter Robert Luther to name it instead. Luther chose to name it after Danaë, the mother of Perseus in Greek mythology.[3] Danaë was the first asteroid to have a diacritical character in its official name.

61 Danaë
Discovery [1]
Discovered byH. Goldschmidt
Discovery siteParis
Discovery date9 September 1860
Designations
(61) Danaë
Pronunciation/ˈdæneɪ.iː/[2]
Named after
Danaë (Greek mythology)[3]
1953 RL1 · A917 SM
main-belt · (outer) [4]
background [5]
AdjectivesDanaëan /dæneɪˈiːən/[6]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc151.67 yr (55,398 days)
Aphelion3.4798 AU
Perihelion2.4840 AU
2.9819 AU
Eccentricity0.1670
5.15 yr (1,881 days)
157.11°
0° 11m 29.04s / day
Inclination18.212°
333.72°
12.695°
Physical characteristics
Dimensions82.04±4.3 km[7]
82.52±2.73 km[8]
83.56±1.02 km[9]
85.125±1.962 km[10]
85.937±2.151 km[11]
91.00±3.50 km[12]
Mass(2.89±2.78)×1018 kg[8]
Mean density
9.81±9.49 g/cm3[8]
11.45 h[13]
11.547±0.001 h[14]
0.181±0.034[12]
0.203±0.014[11]
0.2065±0.0472[10]
0.216±0.006[9]
0.2224±0.025[7]
Tholen = S [1]
SMASS = S [1][4]
B–V = 0.852 [1]
U–B = 0.402 [1]
7.56±0.10[15] · 7.68[1][4][7][9][10][12] · 7.78±0.25[16]

    The asteroid is orbiting the Sun with a period of 5.15 years and is rotating on its axis once every 11.45 hours. In 1985, a study of lightcurve data suggested that Danaë may have a moon. If so, the main body would be an ellipsoid measuring 85 km × 80 km × 75 km (53 mi × 50 mi × 47 mi), and the moon would orbit 101 kilometres (63 mi) away, measuring 55 km × 30 km × 30 km (34 mi × 19 mi × 19 mi). The density of both would be 1.1 g/cm3.[18]

    References
    1. "JPL Small-Body Database Browser: 61 Danae" (2017-04-30 last obs.). Jet Propulsion Laboratory. Retrieved 2 November 2017.
    2. "Danae". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 29 February 2020.
    3. Schmadel, Lutz D. (2007). "(61) Danaë". Dictionary of Minor Planet Names – (61) Danaë. Springer Berlin Heidelberg. p. 21. doi:10.1007/978-3-540-29925-7_62. ISBN 978-3-540-00238-3.
    4. "LCDB Data for (61) Danaë". Asteroid Lightcurve Database (LCDB). Retrieved 2 November 2017.
    5. "Asteroid 61 Danae". Small Bodies Data Ferret. Retrieved 24 October 2019.
    6. Charles Dickens (1852) Household Words, p. 207
    7. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    8. Carry, B. (December 2012). "Density of asteroids". Planetary and Space Science. 73 (1): 98–118. arXiv:1203.4336. Bibcode:2012P&SS...73...98C. doi:10.1016/j.pss.2012.03.009. S2CID 119226456. See Table 1.
    9. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
    10. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 118700974.
    11. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. S2CID 119293330. Retrieved 2 November 2017.
    12. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. S2CID 46350317. Retrieved 2 November 2017.
    13. Wood, X. H. John; Kuiper, Gerard P. (May 1963). "Photometric Studies of Asteroids". Astrophysical Journal. 137: 1279. Bibcode:1963ApJ...137.1279W. doi:10.1086/147603. Retrieved 2 November 2017.
    14. Behrend, Raoul. "Asteroids and comets rotation curves – (61) Danaë". Geneva Observatory. Retrieved 2 November 2017.
    15. Warner, Brian D. (December 2007). "Initial Results of a Dedicated H-G Project". The Minor Planet Bulletin. 34 (4): 113–119. Bibcode:2007MPBu...34..113W. ISSN 1052-8091. Retrieved 2 November 2017.
    16. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 2 November 2017.
    17. "61 Danae". Minor Planet Center. Retrieved 2 November 2017.
    18. "Other reports of asteroid/TNO companions". www.johnstonsarchive.net. Retrieved 13 September 2022.

    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.